* {
  padding: 0px;
  margin: 0px;
}

html,
body,
#app {
  width: 100%;
  height: 100%;
}

ul,
ol {
  list-style: none;
}

a {
  text-decoration: none;
}

img {
  display: block;
}

/* 版心 */
.main {
  min-width: 320px;
  max-width: 750px;
  margin: 0 auto;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: normal;
}